Pentstemon. SCROPHULARIACE^. 269 



ment dilated, uncinate at tip. — Proc. Am. Acad. vi. 73. — New Mexico, Sandia Mountains, 

 Biijvlow. Corolla in size and shape, and probably color, resembling that of P. glaums. 



P. deiistus, Dougl. Completely glabrous ; the calyx at most obscurely granular-prui- 

 nose or glandular : stems a span to a foot higii in tufts from a woody base, rigid : leaves 

 coriaceous, from ovate to oblong-linear or lanceolate (an inch or two long), irregularly and 

 rigidly dentate or acutely serrate, or some of them entire ; upper cauline closely sessile : 

 thyrsus virgate or more paniculate, mostly many-flowered : peduncles and pedicels short : 

 sepals from ovate to lanceolate, nearly marginless : corolla ochroleucous or dull white, 

 rarely with a tinge of purple, half inch or less long, either narrowly or rather broadly fun- 

 nelform ; the short lobes widely spreading. — Lindl. Bot. Reg. t. 1318 ; Benth. 1. c. ; Gray, 

 I.e., & Bot. Calif, i. 559; Watson, Bot. King, 222, Avho has seen the "filament bearded 

 with yellow hairs." P. heterander, Torr. & Gray, Pacif. R. Rep. ii. 123, t. 8, a narrow- 

 leaved form having the fifth filament in some flowers antheriferous. — Dry interior region, 

 California, on the eastern side of the Sierra Nevada, and north to the borders of Brit. 

 Columbia and Montana. 



P. heterodoxus. A span or more high, leafy, glabrous nearly up to the inflorescence : 

 leaves oval or oblong, obtuse, entire; the cauline closely sessile: thyrsus short, compact, 

 viscid-pubescent : sepals lanceolate : corolla 7 lines long, narrow-tubular, hardly dilated up 

 to the small limb, probably purplish : fifth filament filiform, resembling the others, in some 

 flowers completely antheriferous. — P. Fremonti, Gray, Bot. Calif, i. 622, not of Torr. & 

 Gray. — High mountain near Donner Pass, in the Sierra Nevada, California, Torre]]. 

 Species imperfectly known, from insufficient specimens. 



++ -M- Leaves from linear-spatulate to obovate, or the uppermost sometimes ovate, entire : stems 

 low-cespitose or spreadintC. leafy to summit, often suffrutescent at base, few-flowered : corolla 

 over half inch long, mostly purple or blue, narrowly f unnelform : sterile filament bearded down 

 one side. 



= Leaves green and mostly glabrous, broad, half to quarter inch wide. 

 P. Harbourii, Gray. Tufted nearly simple stems 2 to 4 inches high, puberulcnt : leaves 

 about 3 pairs, thickish, obovate, oval, or the uppermost sometimes ovate, these sessile by a 

 broad base : thyrsus reduced to 2 or 3 crowded short-pedicelled flowers : sepals ovate- 

 oblong, villous and somewhat viscid : corolla little bilabiate, with rather broad cylindra- 

 ceous throat and tube, barely twice the length of the round-oval lobes ; lower lip bearded 

 within. — Proc. Am. Acad. vi. 71. — High alpine region of the Colorado Rocky Mountains, 

 //((// & Harbour, Parry. 



=r. = Leaves cinereous or canescent, a line or two wide: sepals lanceolate: corolla narrowly fun- 

 nelform, mostly three-fourths inch long: flowering along the short stems in the axils of the 

 leaves : short peduncles leafy-bracteolate, 1-3-tlowered. 



P. pumilus, Nutt. Canescent (even to the marginless sepals) with a dense and fine 

 short pubescence : stems an inch or two high, erect or ascending, very leafy : leaves lan- 

 ceolate or the lower spatulate (the latter, including the attenuate base or margined petiole, 

 an inch or more long) : corolla with regularly f unnelform throat, glabrous within : sterile 

 filament sparsely short-bearded, or more abxmdantly at the tip. — Jour. Acad. Philad. vii. 

 40; Gray, 1. c. 67. — Rocky Mountains in Montana? " on Little Goddin River," Wi/eth. A 

 small and few-flowered plant. 



Var. Thompsonise. Cespitose, from half inch to 4 inches high, snffrutescent at 

 base : stems copiously flowering for their whole length : lowest leaves obovate ; upper 

 lanceolate : corolla two-thirds to three-fourths inch long. — S. Utah, l\rrs. Thompson, Capt. 

 Bishop (a dwarf and depressed form), also Siler, Palmer, a more developed and elongated 

 form, with corolla appai-ently bright blue. 



Var. incanus. A small and very white-hoary form, few-flowered : leaves only 2 or 3 

 lines long, spatulate and obovate, more mucronate : corolla half inch long, slightly hairy 

 within down the lower side, somewhat as in the next. — Pahranagat Mountains, S. E. 

 Nevada, M!ss Searls. S. W. Utah, Siler. 



P. csespitosus, Nutt. INIinutely cinereous-puberulent, spreading, forming depressed 

 broad tufts 2 to 4 inches high : leaves from narrowly spatulate to almost linear (3 to 8 

 lines long, including the tapering base or margined petiole) : peduncles niostl}' secund and 

 horizontal, but with the flower upturned : sepals more acuminate, and the margins below 

 obscurely scarious : corolla tubular-fnnnelform, and the lower side biplicate, the narrow 

 folds sparsely villous within : sterile filament strongly and densely bearded. — Gray, Proc. 



